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fd3907ccb583df99e9c19d2fe84e4e7c52d75de9
clang-p2996/llvm/test/Transforms/InstCombine/ptr-replace-alloca.ll
Vitaly Buka 6dba99e14f [InstCombine][asan] Don't speculate loads before select ptr (#100773) 
Even if memory is valid from `llvm` point of view,
e.g. local alloca, sanitizers have API for user
specific memory annotations.

These annotations can be used to track size of the
local object, e.g. inline vectors may prevent
accesses beyond the current vector size.

So valid programs should not access those parts of
alloca before checking preconditions.

Fixes #100639.
2024-07-29 11:28:03 -07:00

488 lines
18 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=instcombine -S -o - %s | FileCheck %s
target datalayout="p5:32:32-A5"
@g1 = constant [32 x i8] zeroinitializer
@g2 = addrspace(1) constant [32 x i8] zeroinitializer
define i8 @remove_alloca_use_arg(i1 %cond) {
; CHECK-LABEL: @remove_alloca_use_arg(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
; CHECK: if:
; CHECK-NEXT: br label [[SINK:%.*]]
; CHECK: else:
; CHECK-NEXT: br label [[SINK]]
; CHECK: sink:
; CHECK-NEXT: [[PTR1:%.*]] = phi ptr [ getelementptr inbounds (i8, ptr @g1, i64 2), [[IF]] ], [ getelementptr inbounds (i8, ptr @g1, i64 1), [[ELSE]] ]
; CHECK-NEXT: [[LOAD:%.*]] = load i8, ptr [[PTR1]], align 1
; CHECK-NEXT: ret i8 [[LOAD]]
;
entry:
%alloca = alloca [32 x i8], align 4, addrspace(1)
call void @llvm.memcpy.p1.p0.i64(ptr addrspace(1) %alloca, ptr @g1, i64 32, i1 false)
br i1 %cond, label %if, label %else
if:
%val.if = getelementptr inbounds [32 x i8], ptr addrspace(1) %alloca, i32 0, i32 2
br label %sink
else:
%val.else = getelementptr inbounds [32 x i8], ptr addrspace(1) %alloca, i32 0, i32 1
br label %sink
sink:
%ptr = phi ptr addrspace(1) [ %val.if, %if ], [ %val.else, %else ]
%load = load i8, ptr addrspace(1) %ptr
ret i8 %load
}
define i8 @volatile_load_keep_alloca(i1 %cond) {
; CHECK-LABEL: @volatile_load_keep_alloca(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ALLOCA:%.*]] = alloca [32 x i8], align 4, addrspace(1)
; CHECK-NEXT: call void @llvm.memcpy.p1.p0.i64(ptr addrspace(1) noundef align 4 dereferenceable(32) [[ALLOCA]], ptr noundef nonnull align 16 dereferenceable(32) @g1, i64 32, i1 false)
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
; CHECK: if:
; CHECK-NEXT: [[VAL_IF:%.*]] = getelementptr inbounds i8, ptr addrspace(1) [[ALLOCA]], i64 1
; CHECK-NEXT: br label [[SINK:%.*]]
; CHECK: else:
; CHECK-NEXT: [[VAL_ELSE:%.*]] = getelementptr inbounds i8, ptr addrspace(1) [[ALLOCA]], i64 2
; CHECK-NEXT: br label [[SINK]]
; CHECK: sink:
; CHECK-NEXT: [[PTR:%.*]] = phi ptr addrspace(1) [ [[VAL_IF]], [[IF]] ], [ [[VAL_ELSE]], [[ELSE]] ]
; CHECK-NEXT: [[LOAD:%.*]] = load volatile i8, ptr addrspace(1) [[PTR]], align 1
; CHECK-NEXT: ret i8 [[LOAD]]
;
entry:
%alloca = alloca [32 x i8], align 4, addrspace(1)
call void @llvm.memcpy.p1.p0.i64(ptr addrspace(1) %alloca, ptr @g1, i64 32, i1 false)
br i1 %cond, label %if, label %else
if:
%val.if = getelementptr inbounds [32 x i8], ptr addrspace(1) %alloca, i32 0, i32 1
br label %sink
else:
%val.else = getelementptr inbounds [32 x i8], ptr addrspace(1) %alloca, i32 0, i32 2
br label %sink
sink:
%ptr = phi ptr addrspace(1) [ %val.if, %if ], [ %val.else, %else ]
%load = load volatile i8, ptr addrspace(1) %ptr
ret i8 %load
}
define i8 @no_memcpy_keep_alloca(i1 %cond) {
; CHECK-LABEL: @no_memcpy_keep_alloca(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ALLOCA:%.*]] = alloca [32 x i8], align 4, addrspace(1)
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
; CHECK: if:
; CHECK-NEXT: [[VAL_IF:%.*]] = getelementptr inbounds i8, ptr addrspace(1) [[ALLOCA]], i64 1
; CHECK-NEXT: br label [[SINK:%.*]]
; CHECK: else:
; CHECK-NEXT: [[VAL_ELSE:%.*]] = getelementptr inbounds i8, ptr addrspace(1) [[ALLOCA]], i64 2
; CHECK-NEXT: br label [[SINK]]
; CHECK: sink:
; CHECK-NEXT: [[PTR:%.*]] = phi ptr addrspace(1) [ [[VAL_IF]], [[IF]] ], [ [[VAL_ELSE]], [[ELSE]] ]
; CHECK-NEXT: [[LOAD:%.*]] = load volatile i8, ptr addrspace(1) [[PTR]], align 1
; CHECK-NEXT: ret i8 [[LOAD]]
;
entry:
%alloca = alloca [32 x i8], align 4, addrspace(1)
br i1 %cond, label %if, label %else
if:
%val.if = getelementptr inbounds [32 x i8], ptr addrspace(1) %alloca, i32 0, i32 1
br label %sink
else:
%val.else = getelementptr inbounds [32 x i8], ptr addrspace(1) %alloca, i32 0, i32 2
br label %sink
sink:
%ptr = phi ptr addrspace(1) [ %val.if, %if ], [ %val.else, %else ]
%load = load volatile i8, ptr addrspace(1) %ptr
ret i8 %load
}
define i8 @loop_phi_remove_alloca(i1 %cond) {
; CHECK-LABEL: @loop_phi_remove_alloca(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB_0:%.*]]
; CHECK: bb.0:
; CHECK-NEXT: [[PTR1:%.*]] = phi ptr [ getelementptr inbounds (i8, ptr @g1, i64 1), [[ENTRY:%.*]] ], [ getelementptr inbounds (i8, ptr @g1, i64 2), [[BB_1:%.*]] ]
; CHECK-NEXT: br i1 [[COND:%.*]], label [[BB_1]], label [[EXIT:%.*]]
; CHECK: bb.1:
; CHECK-NEXT: br label [[BB_0]]
; CHECK: exit:
; CHECK-NEXT: [[LOAD:%.*]] = load i8, ptr [[PTR1]], align 1
; CHECK-NEXT: ret i8 [[LOAD]]
;
entry:
%alloca = alloca [32 x i8], align 4, addrspace(1)
call void @llvm.memcpy.p1.p0.i64(ptr addrspace(1) %alloca, ptr @g1, i64 32, i1 false)
%val1 = getelementptr inbounds [32 x i8], ptr addrspace(1) %alloca, i32 0, i32 1
br label %bb.0
bb.0:
%ptr = phi ptr addrspace(1) [ %val1, %entry ], [ %val2, %bb.1 ]
br i1 %cond, label %bb.1, label %exit
bb.1:
%val2 = getelementptr inbounds [32 x i8], ptr addrspace(1) %alloca, i32 0, i32 2
br label %bb.0
exit:
%load = load i8, ptr addrspace(1) %ptr
ret i8 %load
}
define i32 @remove_alloca_ptr_arg(i1 %c, ptr %ptr) {
; CHECK-LABEL: @remove_alloca_ptr_arg(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[JOIN:%.*]]
; CHECK: if:
; CHECK-NEXT: br label [[JOIN]]
; CHECK: join:
; CHECK-NEXT: [[PHI:%.*]] = phi ptr [ @g1, [[IF]] ], [ [[PTR:%.*]], [[ENTRY:%.*]] ]
; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[PHI]], align 4
; CHECK-NEXT: ret i32 [[V]]
;
entry:
%alloca = alloca [32 x i8]
call void @llvm.memcpy.p0.p0.i64(ptr %alloca, ptr @g1, i64 32, i1 false)
br i1 %c, label %if, label %join
if:
br label %join
join:
%phi = phi ptr [ %alloca, %if ], [ %ptr, %entry ]
%v = load i32, ptr %phi
ret i32 %v
}
define i8 @loop_phi_late_memtransfer_remove_alloca(i1 %cond) {
; CHECK-LABEL: @loop_phi_late_memtransfer_remove_alloca(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB_0:%.*]]
; CHECK: bb.0:
; CHECK-NEXT: [[PTR1:%.*]] = phi ptr [ getelementptr inbounds (i8, ptr @g1, i64 1), [[ENTRY:%.*]] ], [ getelementptr inbounds (i8, ptr @g1, i64 2), [[BB_1:%.*]] ]
; CHECK-NEXT: br i1 [[COND:%.*]], label [[BB_1]], label [[EXIT:%.*]]
; CHECK: bb.1:
; CHECK-NEXT: br label [[BB_0]]
; CHECK: exit:
; CHECK-NEXT: [[LOAD:%.*]] = load i8, ptr [[PTR1]], align 1
; CHECK-NEXT: ret i8 [[LOAD]]
;
entry:
%alloca = alloca [32 x i8], align 4, addrspace(1)
%val1 = getelementptr inbounds [32 x i8], ptr addrspace(1) %alloca, i32 0, i32 1
br label %bb.0
bb.0:
%ptr = phi ptr addrspace(1) [ %val1, %entry ], [ %val2, %bb.1 ]
br i1 %cond, label %bb.1, label %exit
bb.1:
%val2 = getelementptr inbounds [32 x i8], ptr addrspace(1) %alloca, i32 0, i32 2
call void @llvm.memcpy.p1.p0.i64(ptr addrspace(1) %alloca, ptr @g1, i64 32, i1 false)
br label %bb.0
exit:
%load = load i8, ptr addrspace(1) %ptr
ret i8 %load
}
define i32 @test_memcpy_after_phi(i1 %cond, ptr %ptr) {
; CHECK-LABEL: @test_memcpy_after_phi(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = alloca [32 x i8], align 1
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF:%.*]], label [[JOIN:%.*]]
; CHECK: if:
; CHECK-NEXT: br label [[JOIN]]
; CHECK: join:
; CHECK-NEXT: [[PHI:%.*]] = phi ptr [ [[A]], [[IF]] ], [ [[PTR:%.*]], [[ENTRY:%.*]] ]
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(32) [[PHI]], ptr noundef nonnull align 16 dereferenceable(32) @g1, i64 32, i1 false)
; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[PHI]], align 4
; CHECK-NEXT: ret i32 [[V]]
;
entry:
%a = alloca [32 x i8]
br i1 %cond, label %if, label %join
if:
br label %join
join:
%phi = phi ptr [ %a, %if ], [ %ptr, %entry ]
call void @llvm.memcpy.p0.p0.i64(ptr %phi, ptr @g1, i64 32, i1 false)
%v = load i32, ptr %phi
ret i32 %v
}
define i32 @addrspace_diff_keep_alloca(i1 %cond, ptr %x) {
; CHECK-LABEL: @addrspace_diff_keep_alloca(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = alloca [32 x i8], align 1
; CHECK-NEXT: call void @llvm.memcpy.p0.p1.i64(ptr noundef nonnull align 1 dereferenceable(32) [[A]], ptr addrspace(1) noundef align 16 dereferenceable(32) @g2, i64 32, i1 false)
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF:%.*]], label [[JOIN:%.*]]
; CHECK: if:
; CHECK-NEXT: br label [[JOIN]]
; CHECK: join:
; CHECK-NEXT: [[PHI:%.*]] = phi ptr [ [[A]], [[IF]] ], [ [[X:%.*]], [[ENTRY:%.*]] ]
; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[PHI]], align 4
; CHECK-NEXT: ret i32 [[V]]
;
entry:
%a = alloca [32 x i8]
call void @llvm.memcpy.p0.p1.i64(ptr %a, ptr addrspace(1) @g2, i64 32, i1 false)
br i1 %cond, label %if, label %join
if:
br label %join
join:
%phi = phi ptr [ %a, %if ], [ %x, %entry ]
%v = load i32, ptr %phi
ret i32 %v
}
define i32 @addrspace_diff_keep_alloca_extra_gep(i1 %cond, ptr %x) {
; CHECK-LABEL: @addrspace_diff_keep_alloca_extra_gep(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = alloca [32 x i8], align 1
; CHECK-NEXT: call void @llvm.memcpy.p0.p1.i64(ptr noundef nonnull align 1 dereferenceable(32) [[A]], ptr addrspace(1) noundef align 16 dereferenceable(32) @g2, i64 32, i1 false)
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF:%.*]], label [[JOIN:%.*]]
; CHECK: if:
; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[A]], i64 4
; CHECK-NEXT: br label [[JOIN]]
; CHECK: join:
; CHECK-NEXT: [[PHI:%.*]] = phi ptr [ [[GEP]], [[IF]] ], [ [[X:%.*]], [[ENTRY:%.*]] ]
; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[PHI]], align 4
; CHECK-NEXT: ret i32 [[V]]
;
entry:
%a = alloca [32 x i8]
call void @llvm.memcpy.p0.p1.i64(ptr %a, ptr addrspace(1) @g2, i64 32, i1 false)
%gep = getelementptr i8, ptr %a, i64 4
br i1 %cond, label %if, label %join
if:
br label %join
join:
%phi = phi ptr [ %gep, %if ], [ %x, %entry ]
%v = load i32, ptr %phi
ret i32 %v
}
define i32 @addrspace_diff_remove_alloca(i1 %cond) {
; CHECK-LABEL: @addrspace_diff_remove_alloca(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF:%.*]], label [[JOIN:%.*]]
; CHECK: if:
; CHECK-NEXT: br label [[JOIN]]
; CHECK: join:
; CHECK-NEXT: [[PHI1:%.*]] = phi ptr addrspace(1) [ @g2, [[IF]] ], [ getelementptr inbounds (i8, ptr addrspace(1) @g2, i64 2), [[ENTRY:%.*]] ]
; CHECK-NEXT: [[V:%.*]] = load i32, ptr addrspace(1) [[PHI1]], align 4
; CHECK-NEXT: ret i32 [[V]]
;
entry:
%a = alloca [32 x i8]
call void @llvm.memcpy.p0.p1.i64(ptr %a, ptr addrspace(1) @g2, i64 32, i1 false)
%gep = getelementptr inbounds [32 x i8], ptr %a, i32 0, i32 2
br i1 %cond, label %if, label %join
if:
br label %join
join:
%phi = phi ptr [ %a, %if ], [ %gep, %entry ]
%v = load i32, ptr %phi
ret i32 %v
}
define i32 @phi_loop(i1 %c) {
; CHECK-LABEL: @phi_loop(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[PTR:%.*]] = phi ptr [ @g1, [[ENTRY:%.*]] ], [ [[PTR_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[PTR_NEXT]] = getelementptr i8, ptr [[PTR]], i64 4
; CHECK-NEXT: br i1 [[C:%.*]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[PTR]], align 4
; CHECK-NEXT: ret i32 [[V]]
;
entry:
%alloca = alloca [32 x i8]
call void @llvm.memcpy.p0.p0.i64(ptr %alloca, ptr @g1, i64 32, i1 false)
br label %loop
loop:
%ptr = phi ptr [ %alloca, %entry ], [ %ptr.next, %loop ]
%ptr.next = getelementptr i8, ptr %ptr, i64 4
br i1 %c, label %exit, label %loop
exit:
%v = load i32, ptr %ptr
ret i32 %v
}
define i32 @phi_loop_different_addrspace(i1 %c) {
; CHECK-LABEL: @phi_loop_different_addrspace(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ALLOCA:%.*]] = alloca [32 x i8], align 1
; CHECK-NEXT: call void @llvm.memcpy.p0.p1.i64(ptr noundef nonnull align 1 dereferenceable(32) [[ALLOCA]], ptr addrspace(1) noundef align 16 dereferenceable(32) @g2, i64 32, i1 false)
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[PTR:%.*]] = phi ptr [ [[ALLOCA]], [[ENTRY:%.*]] ], [ [[PTR_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[PTR_NEXT]] = getelementptr i8, ptr [[PTR]], i64 4
; CHECK-NEXT: br i1 [[C:%.*]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[PTR]], align 4
; CHECK-NEXT: ret i32 [[V]]
;
entry:
%alloca = alloca [32 x i8]
call void @llvm.memcpy.p0.p1.i64(ptr %alloca, ptr addrspace(1) @g2, i64 32, i1 false)
br label %loop
loop:
%ptr = phi ptr [ %alloca, %entry ], [ %ptr.next, %loop ]
%ptr.next = getelementptr i8, ptr %ptr, i64 4
br i1 %c, label %exit, label %loop
exit:
%v = load i32, ptr %ptr
ret i32 %v
}
define i8 @select_same_addrspace_remove_alloca(i1 %cond, ptr %p) {
; CHECK-LABEL: @select_same_addrspace_remove_alloca(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[PTR:%.*]] = select i1 [[COND:%.*]], ptr @g1, ptr [[P:%.*]]
; CHECK-NEXT: [[LOAD:%.*]] = load i8, ptr [[PTR]], align 1
; CHECK-NEXT: ret i8 [[LOAD]]
;
entry:
%alloca = alloca [32 x i8]
call void @llvm.memcpy.p0.p0.i64(ptr %alloca, ptr @g1, i64 32, i1 false)
%ptr = select i1 %cond, ptr %alloca, ptr %p
%load = load i8, ptr %ptr
ret i8 %load
}
define i8 @select_after_memcpy_keep_alloca(i1 %cond, ptr %p) {
; CHECK-LABEL: @select_after_memcpy_keep_alloca(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ALLOCA:%.*]] = alloca [32 x i8], align 1
; CHECK-NEXT: [[PTR:%.*]] = select i1 [[COND:%.*]], ptr [[ALLOCA]], ptr [[P:%.*]]
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(32) [[PTR]], ptr noundef nonnull align 16 dereferenceable(32) @g1, i64 32, i1 false)
; CHECK-NEXT: [[LOAD:%.*]] = load i8, ptr [[PTR]], align 1
; CHECK-NEXT: ret i8 [[LOAD]]
;
entry:
%alloca = alloca [32 x i8]
%ptr = select i1 %cond, ptr %alloca, ptr %p
call void @llvm.memcpy.p0.p0.i64(ptr %ptr, ptr @g1, i64 32, i1 false)
%load = load i8, ptr %ptr
ret i8 %load
}
define i8 @select_diff_addrspace_keep_alloca(i1 %cond, ptr addrspace(1) %p) {
; CHECK-LABEL: @select_diff_addrspace_keep_alloca(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[ALLOCA:%.*]] = alloca [32 x i8], align 1, addrspace(1)
; CHECK-NEXT: call void @llvm.memcpy.p1.p0.i64(ptr addrspace(1) noundef align 1 dereferenceable(32) [[ALLOCA]], ptr noundef nonnull align 16 dereferenceable(32) @g1, i64 32, i1 false)
; CHECK-NEXT: [[PTR:%.*]] = select i1 [[COND:%.*]], ptr addrspace(1) [[ALLOCA]], ptr addrspace(1) [[P:%.*]]
; CHECK-NEXT: [[LOAD:%.*]] = load i8, ptr addrspace(1) [[PTR]], align 1
; CHECK-NEXT: ret i8 [[LOAD]]
;
entry:
%alloca = alloca [32 x i8], addrspace(1)
call void @llvm.memcpy.p1.p0.i64(ptr addrspace(1) %alloca, ptr @g1, i64 32, i1 false)
%ptr = select i1 %cond, ptr addrspace(1) %alloca, ptr addrspace(1) %p
%load = load i8, ptr addrspace(1) %ptr
ret i8 %load
}
define i8 @select_diff_addrspace_remove_alloca(i1 %cond, ptr %p) {
; CHECK-LABEL: @select_diff_addrspace_remove_alloca(
; CHECK-NEXT: entry:
; CHECK-NEXT: ret i8 0
;
entry:
%alloca = alloca [32 x i8]
call void @llvm.memcpy.p0.p1.i64(ptr %alloca, ptr addrspace(1) @g2, i64 32, i1 false)
%gep = getelementptr inbounds [32 x i8], ptr %alloca, i32 0, i32 2
%sel = select i1 %cond, ptr %alloca, ptr %gep
%gep2 = getelementptr inbounds i8, ptr %sel, i64 4
%load = load i8, ptr %gep2
ret i8 %load
}
define i8 @select_diff_addrspace_remove_alloca_asan(i1 %cond, ptr %p) sanitize_address {
; CHECK-LABEL: @select_diff_addrspace_remove_alloca_asan(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[GEP2:%.*]] = select i1 [[COND:%.*]], ptr addrspace(1) getelementptr inbounds (i8, ptr addrspace(1) @g2, i64 4), ptr addrspace(1) getelementptr inbounds (i8, ptr addrspace(1) @g2, i64 6)
; CHECK-NEXT: [[LOAD:%.*]] = load i8, ptr addrspace(1) [[GEP2]], align 1
; CHECK-NEXT: ret i8 [[LOAD]]
;
entry:
%alloca = alloca [32 x i8]
call void @llvm.memcpy.p0.p1.i64(ptr %alloca, ptr addrspace(1) @g2, i64 32, i1 false)
%gep = getelementptr inbounds [32 x i8], ptr %alloca, i32 0, i32 2
%sel = select i1 %cond, ptr %alloca, ptr %gep
%gep2 = getelementptr inbounds i8, ptr %sel, i64 4
%load = load i8, ptr %gep2
ret i8 %load
}
declare i8 @readonly_callee(ptr readonly nocapture)
; FIXME: This should be able to fold to call i8 @readonly_callee(ptr nonnull @g1)
define i8 @call_readonly_remove_alloca() {
; CHECK-LABEL: @call_readonly_remove_alloca(
; CHECK-NEXT: [[ALLOCA:%.*]] = alloca [32 x i8], align 1, addrspace(1)
; CHECK-NEXT: call void @llvm.memcpy.p1.p0.i64(ptr addrspace(1) noundef align 1 dereferenceable(32) [[ALLOCA]], ptr noundef nonnull align 16 dereferenceable(32) @g1, i64 32, i1 false)
; CHECK-NEXT: [[P:%.*]] = addrspacecast ptr addrspace(1) [[ALLOCA]] to ptr
; CHECK-NEXT: [[V:%.*]] = call i8 @readonly_callee(ptr [[P]])
; CHECK-NEXT: ret i8 [[V]]
;
%alloca = alloca [32 x i8], addrspace(1)
call void @llvm.memcpy.p1.p0.i64(ptr addrspace(1) %alloca, ptr @g1, i64 32, i1 false)
%p = addrspacecast ptr addrspace(1) %alloca to ptr
%v = call i8 @readonly_callee(ptr %p)
ret i8 %v
}
define i8 @call_readonly_keep_alloca2() {
; CHECK-LABEL: @call_readonly_keep_alloca2(
; CHECK-NEXT: [[ALLOCA:%.*]] = alloca [32 x i8], align 1, addrspace(1)
; CHECK-NEXT: call void @llvm.memcpy.p1.p0.i64(ptr addrspace(1) noundef align 1 dereferenceable(16) [[ALLOCA]], ptr noundef nonnull align 16 dereferenceable(16) @g1, i64 16, i1 false)
; CHECK-NEXT: [[A1:%.*]] = getelementptr inbounds i8, ptr addrspace(1) [[ALLOCA]], i64 16
; CHECK-NEXT: call void @llvm.memcpy.p1.p1.i64(ptr addrspace(1) noundef align 1 dereferenceable(16) [[A1]], ptr addrspace(1) noundef align 16 dereferenceable(16) @g2, i64 16, i1 false)
; CHECK-NEXT: [[P:%.*]] = addrspacecast ptr addrspace(1) [[ALLOCA]] to ptr
; CHECK-NEXT: [[V:%.*]] = call i8 @readonly_callee(ptr [[P]])
; CHECK-NEXT: ret i8 [[V]]
;
%alloca = alloca [32 x i8], addrspace(1)
call void @llvm.memcpy.p1.p0.i64(ptr addrspace(1) %alloca, ptr @g1, i64 16, i1 false)
%a1 = getelementptr inbounds [32 x i8], ptr addrspace(1) %alloca, i32 0, i32 16
call void @llvm.memcpy.p1.p1.i64(ptr addrspace(1) %a1, ptr addrspace(1) @g2, i64 16, i1 false)
%p = addrspacecast ptr addrspace(1) %alloca to ptr
%v = call i8 @readonly_callee(ptr %p)
ret i8 %v
}
declare void @llvm.memcpy.p1.p0.i64(ptr addrspace(1), ptr, i64, i1)
declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i1)
declare void @llvm.memcpy.p0.p1.i64(ptr, ptr addrspace(1), i64, i1)
declare void @llvm.memcpy.p1.p1.i64(ptr addrspace(1), ptr addrspace(1), i64, i1)
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