3127b659fa
We already infer this in IPSCCP (which runs very early, so cannot benefit from inlining and simplifications) and SCCP (which runs without PredicateInfo, so does not use assumes). Do it in CVP as well, so it can handle cases that IPSCCP/SCCP can't. Fixes https://github.com/llvm/llvm-project/issues/98946 (everything apart from f2, where the assume is dropped by the frontend).
97 lines
2.7 KiB
LLVM
97 lines
2.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -S -passes=correlated-propagation < %s | FileCheck %s
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declare void @use(i1)
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define void @test_icmp_from_implied_cond(i32 %a, i32 %b) {
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; CHECK-LABEL: define void @test_icmp_from_implied_cond(
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; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
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; CHECK-NEXT: [[A_CMP:%.*]] = icmp ugt i32 [[A]], 32
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; CHECK-NEXT: br i1 [[A_CMP]], label [[END:%.*]], label [[L1:%.*]]
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; CHECK: l1:
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; CHECK-NEXT: [[COND:%.*]] = icmp ult i32 [[B]], [[A]]
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; CHECK-NEXT: br i1 [[COND]], label [[L2:%.*]], label [[END]]
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; CHECK: l2:
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: [[B_CMP2:%.*]] = icmp ult i32 [[B]], 31
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; CHECK-NEXT: call void @use(i1 [[B_CMP2]])
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; CHECK-NEXT: ret void
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; CHECK: end:
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; CHECK-NEXT: ret void
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;
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%a.cmp = icmp ugt i32 %a, 32
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br i1 %a.cmp, label %end, label %l1
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l1:
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%cond = icmp ult i32 %b, %a
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br i1 %cond, label %l2, label %end
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l2:
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%b.cmp1 = icmp ult i32 %b, 32
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call void @use(i1 %b.cmp1)
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%b.cmp2 = icmp ult i32 %b, 31
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call void @use(i1 %b.cmp2)
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ret void
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end:
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ret void
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}
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define i64 @test_sext_from_implied_cond(i32 %a, i32 %b) {
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; CHECK-LABEL: define range(i64 0, 2147483647) i64 @test_sext_from_implied_cond(
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; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
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; CHECK-NEXT: [[A_CMP:%.*]] = icmp slt i32 [[A]], 0
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; CHECK-NEXT: br i1 [[A_CMP]], label [[END:%.*]], label [[L1:%.*]]
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; CHECK: l1:
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; CHECK-NEXT: [[COND:%.*]] = icmp ult i32 [[B]], [[A]]
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; CHECK-NEXT: br i1 [[COND]], label [[L2:%.*]], label [[END]]
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; CHECK: l2:
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; CHECK-NEXT: [[SEXT:%.*]] = zext nneg i32 [[B]] to i64
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; CHECK-NEXT: ret i64 [[SEXT]]
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; CHECK: end:
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; CHECK-NEXT: ret i64 0
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;
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%a.cmp = icmp slt i32 %a, 0
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br i1 %a.cmp, label %end, label %l1
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l1:
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%cond = icmp ult i32 %b, %a
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br i1 %cond, label %l2, label %end
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l2:
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%sext = sext i32 %b to i64
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ret i64 %sext
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end:
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ret i64 0
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}
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define void @test_icmp_from_implied_range(i16 %x, i32 %b) {
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; CHECK-LABEL: define void @test_icmp_from_implied_range(
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; CHECK-SAME: i16 [[X:%.*]], i32 [[B:%.*]]) {
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; CHECK-NEXT: [[A:%.*]] = zext i16 [[X]] to i32
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; CHECK-NEXT: [[COND:%.*]] = icmp ult i32 [[B]], [[A]]
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; CHECK-NEXT: br i1 [[COND]], label [[L1:%.*]], label [[END:%.*]]
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; CHECK: l1:
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; CHECK-NEXT: call void @use(i1 true)
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; CHECK-NEXT: [[B_CMP2:%.*]] = icmp ult i32 [[B]], 65534
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; CHECK-NEXT: call void @use(i1 [[B_CMP2]])
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; CHECK-NEXT: ret void
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; CHECK: end:
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; CHECK-NEXT: ret void
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;
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%a = zext i16 %x to i32
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%cond = icmp ult i32 %b, %a
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br i1 %cond, label %l1, label %end
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l1:
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%b.cmp1 = icmp ult i32 %b, 65535
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call void @use(i1 %b.cmp1)
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%b.cmp2 = icmp ult i32 %b, 65534
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call void @use(i1 %b.cmp2)
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ret void
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end:
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ret void
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}
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