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clang-p2996/llvm/test/Transforms/GVN/PRE/pre-load-through-select.ll
Florian Hahn 8a12cae862 [GVN] Support load of pointer-select to value-select conversion. 
This patch extends the available-value logic to detect loads
of pointer-selects that can be replaced by a value select.

For example, consider the code below:

  loop:
    %sel.phi = phi i32* [ %start, %ph ], [ %sel, %ph ]
    %l = load %ptr
    %l.sel = load %sel.phi
    %sel = select cond, %ptr, %sel.phi
    ...

  exit:
    %res = load %sel
    use(%res)

The load of the pointer phi can be replaced by a load of the start value
outside the loop and a new phi/select chain based on the loaded values,
as illustrated below

    %l.start = load %start
  loop:
    sel.phi.prom = phi i32 [ %l.start, %ph ], [ %sel.prom, %ph ]
    %l = load %ptr
    %sel.prom = select cond, %l, %sel.phi.prom
    ...
  exit:
    use(%sel.prom)

This is a first step towards alllowing vectorizing loops using common libc++
library functions, like std::min_element (https://clang.godbolt.org/z/6czGzzqbs)

    #include <vector>
    #include <algorithm>

    int foo(const std::vector<int> &V) {
        return *std::min_element(V.begin(), V.end());
    }

Reviewed By: reames

Differential Revision: https://reviews.llvm.org/D118143
2022-02-02 09:23:09 +00:00

751 lines
27 KiB
LLVM
Raw Blame History

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes='require<domtree>,loop(loop-simplifycfg),gvn' -S %s | FileCheck %s
define i32 @test_pointer_phi_select_simp_1(i32* %a, i32* %b, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[TMP0:%.*]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: [[RES_2_PRE:%.*]] = load i32, i32* [[A]], align 4
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[RES_2:%.*]] = phi i32 [ [[TMP0]], [[THEN]] ], [ [[RES_2_PRE]], [[ELSE]] ]
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%res.2 = load i32, i32* %p, align 4
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_no_load_for_select_op_1(i32* %a, i32* %b, i32* %c, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_no_load_for_select_op_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[C:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A:%.*]], i32* [[B]]
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: [[RES_2:%.*]] = load i32, i32* [[P]], align 4
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %c, align 4
%l.2 = load i32, i32* %b, align 4
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%res.2 = load i32, i32* %p, align 4
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_no_load_for_select_op_2(i32* %a, i32* %b, i32* %c, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_no_load_for_select_op_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[C:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B:%.*]]
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: [[RES_2:%.*]] = load i32, i32* [[P]], align 4
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %c, align 4
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%res.2 = load i32, i32* %p, align 4
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_store_noclobber(i32* %a, i32* %b, i32* noalias %c, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_store_noclobber(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: store i32 99, i32* [[C:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[TMP0:%.*]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: [[RES_2_PRE:%.*]] = load i32, i32* [[A]], align 4
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[RES_2:%.*]] = phi i32 [ [[TMP0]], [[THEN]] ], [ [[RES_2_PRE]], [[ELSE]] ]
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
store i32 99, i32* %c
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%res.2 = load i32, i32* %p, align 4
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_store_clobber_1(i32* %a, i32* %b, i32* %c, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_store_clobber_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: store i32 99, i32* [[C:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: [[RES_2:%.*]] = load i32, i32* [[P]], align 4
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
store i32 99, i32* %c
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%res.2 = load i32, i32* %p, align 4
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_store_clobber_2(i32* %a, i32* %b, i32* %c, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_store_clobber_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: store i32 99, i32* [[C:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: [[RES_2:%.*]] = load i32, i32* [[P]], align 4
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
store i32 99, i32* %c
%l.2 = load i32, i32* %b, align 4
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%res.2 = load i32, i32* %p, align 4
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_store_clobber_3(i32* %a, i32* %b, i32* %c, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_store_clobber_3(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: store i32 99, i32* [[C:%.*]], align 4
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: [[RES_2:%.*]] = load i32, i32* [[P]], align 4
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
store i32 99, i32* %c
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%res.2 = load i32, i32* %p, align 4
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_store_clobber_4(i32* %a, i32* %b, i32* %c, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_store_clobber_4(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: store i32 99, i32* [[C:%.*]], align 4
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: [[RES_2:%.*]] = load i32, i32* [[P]], align 4
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
store i32 99, i32* %c
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%res.2 = load i32, i32* %p, align 4
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_store_clobber_5(i32* %a, i32* %b, i32* %c, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_store_clobber_5(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: store i32 99, i32* [[C:%.*]], align 4
; CHECK-NEXT: [[RES_2:%.*]] = load i32, i32* [[P]], align 4
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
store i32 99, i32* %c
%res.2 = load i32, i32* %p, align 4
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_store_clobber_6(i32* %a, i32* %b, i32* %c, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_store_clobber_6(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: store i32 99, i32* [[C:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: [[RES_0:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: [[RES_2_PRE:%.*]] = load i32, i32* [[A]], align 4
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[RES_2:%.*]] = phi i32 [ [[RES_0]], [[THEN]] ], [ [[RES_2_PRE]], [[ELSE]] ]
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: [[V:%.*]] = phi i32 [ [[RES_0]], [[THEN]] ], [ 10, [[ELSE]] ]
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[RES_2]], [[V]]
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
store i32 99, i32* %c
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
%res.0 = load i32, i32* %min.select, align 4
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%v = phi i32 [ %res.0, %then ], [ 10, %else ]
%res.2 = load i32, i32* %p, align 4
%add = add i32 %res.2, %v
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_store_clobber_7(i32* %a, i32* %b, i32* %c, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_store_clobber_7(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: store i32 99, i32* [[C:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: [[RES_0:%.*]] = load i32, i32* [[A]], align 4
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: [[V:%.*]] = phi i32 [ [[RES_0]], [[THEN]] ], [ 10, [[ELSE]] ]
; CHECK-NEXT: [[RES_2:%.*]] = load i32, i32* [[P]], align 4
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[RES_2]], [[V]]
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
store i32 99, i32* %c
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
%res.0 = load i32, i32* %a, align 4
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%v = phi i32 [ %res.0, %then ], [ 10, %else ]
%res.2 = load i32, i32* %p, align 4
%add = add i32 %res.2, %v
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_store_clobber_8(i32* %a, i32* %b, i32* %c, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_store_clobber_8(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: store i32 99, i32* [[C:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: [[RES_0:%.*]] = load i32, i32* [[B]], align 4
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: [[V:%.*]] = phi i32 [ [[RES_0]], [[THEN]] ], [ 10, [[ELSE]] ]
; CHECK-NEXT: [[RES_2:%.*]] = load i32, i32* [[P]], align 4
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[RES_2]], [[V]]
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
store i32 99, i32* %c
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
%res.0 = load i32, i32* %b, align 4
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%v = phi i32 [ %res.0, %then ], [ 10, %else ]
%res.2 = load i32, i32* %p, align 4
%add = add i32 %res.2, %v
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_store_clobber_9(i32* %a, i32* %b, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_store_clobber_9(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: store i32 99, i32* [[A]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: [[RES_0:%.*]] = load i32, i32* [[B]], align 4
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: [[V:%.*]] = phi i32 [ [[RES_0]], [[THEN]] ], [ 10, [[ELSE]] ]
; CHECK-NEXT: [[RES_2:%.*]] = load i32, i32* [[P]], align 4
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[RES_2]], [[V]]
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
store i32 99, i32* %a
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
%res.0 = load i32, i32* %b, align 4
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%v = phi i32 [ %res.0, %then ], [ 10, %else ]
%res.2 = load i32, i32* %p, align 4
%add = add i32 %res.2, %v
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_store_clobber_10(i32* %a, i32* %b, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_store_clobber_10(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: store i32 99, i32* [[A]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: [[V:%.*]] = phi i32 [ [[L_2]], [[THEN]] ], [ 10, [[ELSE]] ]
; CHECK-NEXT: [[RES_2:%.*]] = load i32, i32* [[P]], align 4
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[RES_2]], [[V]]
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
store i32 99, i32* %a
%l.2 = load i32, i32* %b, align 4
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
%res.0 = load i32, i32* %b, align 4
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%v = phi i32 [ %res.0, %then ], [ 10, %else ]
%res.2 = load i32, i32* %p, align 4
%add = add i32 %res.2, %v
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_store_clobber_11(i32* %a, i32* %b, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_store_clobber_11(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: store i32 99, i32* [[B]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: [[V:%.*]] = phi i32 [ 99, [[THEN]] ], [ 10, [[ELSE]] ]
; CHECK-NEXT: [[RES_2:%.*]] = load i32, i32* [[P]], align 4
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[RES_2]], [[V]]
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
store i32 99, i32* %b
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
%res.0 = load i32, i32* %b, align 4
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%v = phi i32 [ %res.0, %then ], [ 10, %else ]
%res.2 = load i32, i32* %p, align 4
%add = add i32 %res.2, %v
ret i32 %res.2
}
define i32 @test_pointer_phi_select_simp_store_clobber_12(i32* %a, i32* %b, i1 %cond) {
; CHECK-LABEL: @test_pointer_phi_select_simp_store_clobber_12(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: store i32 99, i32* [[B:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], 99
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: [[P:%.*]] = phi i32* [ [[MIN_SELECT]], [[THEN]] ], [ [[A]], [[ELSE]] ]
; CHECK-NEXT: [[V:%.*]] = phi i32 [ 99, [[THEN]] ], [ 10, [[ELSE]] ]
; CHECK-NEXT: [[RES_2:%.*]] = load i32, i32* [[P]], align 4
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[RES_2]], [[V]]
; CHECK-NEXT: ret i32 [[RES_2]]
;
entry:
br i1 %cond, label %then, label %else
then:
%l.1 = load i32, i32* %a, align 4
store i32 99, i32* %b
%l.2 = load i32, i32* %b, align 4
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
%res.0 = load i32, i32* %b, align 4
br label %exit
else:
br label %exit
exit:
%p = phi i32* [ %min.select, %then ], [ %a, %else ]
%v = phi i32 [ %res.0, %then ], [ 10, %else ]
%res.2 = load i32, i32* %p, align 4
%add = add i32 %res.2, %v
ret i32 %res.2
}
define i32 @test_pointer_phi_select_single_block_store(i32* %a, i32* %b) {
; CHECK-LABEL: @test_pointer_phi_select_single_block_store(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[TMP0:%.*]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: ret i32 [[TMP0]]
;
entry:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
%res.0 = load i32, i32* %min.select, align 4
ret i32 %res.0
}
define i32 @test_pointer_phi_select_single_block_store_clobber_1(i32* %a, i32* %b, i32* %c) {
; CHECK-LABEL: @test_pointer_phi_select_single_block_store_clobber_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: store i32 99, i32* [[C:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: [[RES_0:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT: ret i32 [[RES_0]]
;
entry:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
store i32 99, i32* %c
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
%res.0 = load i32, i32* %min.select, align 4
ret i32 %res.0
}
define i32 @test_pointer_phi_select_single_block_store_clobber_2(i32* %a, i32* %b, i32* %c) {
; CHECK-LABEL: @test_pointer_phi_select_single_block_store_clobber_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: store i32 99, i32* [[C:%.*]], align 4
; CHECK-NEXT: [[RES_0:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT: ret i32 [[RES_0]]
;
entry:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
store i32 99, i32* %c
%res.0 = load i32, i32* %min.select, align 4
ret i32 %res.0
}
define i32 @test_pointer_phi_select_single_block_store_clobber_3(i32* %a, i32* %b, i32* %c) {
; CHECK-LABEL: @test_pointer_phi_select_single_block_store_clobber_3(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: store i32 99, i32* [[C:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: [[RES_0:%.*]] = load i32, i32* [[MIN_SELECT]], align 4
; CHECK-NEXT: ret i32 [[RES_0]]
;
entry:
%l.1 = load i32, i32* %a, align 4
store i32 99, i32* %c
%l.2 = load i32, i32* %b, align 4
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
%res.0 = load i32, i32* %min.select, align 4
ret i32 %res.0
}
define i32 @test_pointer_phi_select_single_block_store_after(i32* %a, i32* %b, i32* %c) {
; CHECK-LABEL: @test_pointer_phi_select_single_block_store_after(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[L_1:%.*]] = load i32, i32* [[A:%.*]], align 4
; CHECK-NEXT: [[L_2:%.*]] = load i32, i32* [[B:%.*]], align 4
; CHECK-NEXT: [[CMP_I_I_I:%.*]] = icmp ult i32 [[L_1]], [[L_2]]
; CHECK-NEXT: [[TMP0:%.*]] = select i1 [[CMP_I_I_I]], i32 [[L_1]], i32 [[L_2]]
; CHECK-NEXT: [[MIN_SELECT:%.*]] = select i1 [[CMP_I_I_I]], i32* [[A]], i32* [[B]]
; CHECK-NEXT: store i32 99, i32* [[C:%.*]], align 4
; CHECK-NEXT: ret i32 [[TMP0]]
;
entry:
%l.1 = load i32, i32* %a, align 4
%l.2 = load i32, i32* %b, align 4
%cmp.i.i.i = icmp ult i32 %l.1, %l.2
%min.select = select i1 %cmp.i.i.i, i32* %a, i32* %b
%res.0 = load i32, i32* %min.select, align 4
store i32 99, i32* %c
ret i32 %res.0
}
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