assumes.ll
1.01 KB
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -newgvn -S | FileCheck %s
define i32 @test1(i32 %arg) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[CMP:%.*]] = icmp sge i32 [[ARG:%.*]], 5
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
; CHECK-NEXT: ret i32 [[ARG]]
;
%cmp = icmp sge i32 %arg, 5
call void @llvm.assume(i1 %cmp)
ret i32 %arg
}
define i32 @test2(i32 %arg, i1 %b) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: br label [[BB:%.*]]
; CHECK: bb:
; CHECK-NEXT: [[A:%.*]] = phi i32 [ 1, [[TMP0:%.*]] ], [ 2, [[BB]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[ARG:%.*]], [[A]]
; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
; CHECK-NEXT: br i1 [[B:%.*]], label [[BB]], label [[END:%.*]]
; CHECK: end:
; CHECK-NEXT: ret i32 [[ARG]]
;
br label %bb
bb:
%a = phi i32 [ 1, %0 ], [ 2, %bb ]
%cmp = icmp eq i32 %arg, %a
call void @llvm.assume(i1 %cmp)
br i1 %b, label %bb, label %end
end:
ret i32 %arg
}
declare void @llvm.assume(i1 %cond)