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be94a5a691
* Backport some patches (originally from rust, and upstreamed) to fix two failing tests in rustc.
53 lines
2.0 KiB
Diff
53 lines
2.0 KiB
Diff
commit 156cc49e505986a1659adaa3a0b5a070372377c8
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Author: Chandler Carruth <chandlerc@gmail.com>
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Date: Tue Jun 27 03:08:45 2017 +0000
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[SROA] Further test cleanup and add a test for the actual propagation of
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the nonnull attribute distinct from rewriting it into an assume.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@306358 91177308-0d34-0410-b5e6-96231b3b80d8
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--- a/test/Transforms/SROA/preserve-nonnull.ll
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+++ b/test/Transforms/SROA/preserve-nonnull.ll
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@@ -3,8 +3,31 @@
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; Make sure that SROA doesn't lose nonnull metadata
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; on loads from allocas that get optimized out.
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-define float* @yummy_nonnull(float** %arg) {
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-; CHECK-LABEL: define float* @yummy_nonnull(
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+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32, i1)
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+
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+; Check that we do basic propagation of nonnull when rewriting.
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+define i8* @propagate_nonnull(i32* %v) {
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+; CHECK-LABEL: define i8* @propagate_nonnull(
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+; CHECK-NEXT: entry:
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+; CHECK-NEXT: %[[A:.*]] = alloca i8*
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+; CHECK-NEXT: %[[V_CAST:.*]] = bitcast i32* %v to i8*
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+; CHECK-NEXT: store i8* %[[V_CAST]], i8** %[[A]]
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+; CHECK-NEXT: %[[LOAD:.*]] = load volatile i8*, i8** %[[A]], !nonnull !0
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+; CHECK-NEXT: ret i8* %[[LOAD]]
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+entry:
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+ %a = alloca [2 x i8*]
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+ %a.gep0 = getelementptr [2 x i8*], [2 x i8*]* %a, i32 0, i32 0
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+ %a.gep1 = getelementptr [2 x i8*], [2 x i8*]* %a, i32 0, i32 1
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+ %a.gep0.cast = bitcast i8** %a.gep0 to i32**
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+ %a.gep1.cast = bitcast i8** %a.gep1 to i32**
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+ store i32* %v, i32** %a.gep1.cast
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+ store i32* null, i32** %a.gep0.cast
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+ %load = load volatile i8*, i8** %a.gep1, !nonnull !0
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+ ret i8* %load
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+}
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+
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+define float* @turn_nonnull_into_assume(float** %arg) {
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+; CHECK-LABEL: define float* @turn_nonnull_into_assume(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: %[[RETURN:.*]] = load float*, float** %arg, align 8
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; CHECK-NEXT: %[[ASSUME:.*]] = icmp ne float* %[[RETURN]], null
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@@ -19,6 +42,4 @@
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ret float* %ret
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}
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-declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i32, i1)
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-
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!0 = !{}
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