0676acb6fd
Should cover most of the tests for GVN, GVNHoist, GVNSink, GlobalOpt, GlobalSplit, InstCombine, Reassociate, SROA and TailCallElim that had not been updated earlier.
60 lines
1.3 KiB
LLVM
60 lines
1.3 KiB
LLVM
; RUN: opt -passes=gvn -S < %s | FileCheck %s
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target datalayout = "e-p:64:64:64"
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; GVN should ignore the store to p[1] to see that the load from p[0] is
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; fully redundant.
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; CHECK-LABEL: @yes(
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; CHECK: if.then:
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; CHECK-NEXT: store i32 0, i32* %q
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; CHECK-NEXT: ret void
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define void @yes(i1 %c, i32* %p, i32* %q) nounwind {
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entry:
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store i32 0, i32* %p
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%p1 = getelementptr inbounds i32, i32* %p, i64 1
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store i32 1, i32* %p1
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br i1 %c, label %if.else, label %if.then
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if.then:
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%t = load i32, i32* %p
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store i32 %t, i32* %q
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ret void
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if.else:
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ret void
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}
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; GVN should ignore the store to p[1] to see that the first load from p[0] is
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; fully redundant. However, the second load is larger, so it's not a simple
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; redundancy.
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; CHECK-LABEL: @watch_out_for_size_change(
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; CHECK: if.then:
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; CHECK-NEXT: store i32 0, i32* %q
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; CHECK-NEXT: ret void
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; CHECK: if.else:
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; CHECK: load i64, i64* %pc
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; CHECK: store i64
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define void @watch_out_for_size_change(i1 %c, i32* %p, i32* %q) nounwind {
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entry:
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store i32 0, i32* %p
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%p1 = getelementptr inbounds i32, i32* %p, i64 1
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store i32 1, i32* %p1
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br i1 %c, label %if.else, label %if.then
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if.then:
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%t = load i32, i32* %p
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store i32 %t, i32* %q
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ret void
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if.else:
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%pc = bitcast i32* %p to i64*
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%qc = bitcast i32* %q to i64*
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%t64 = load i64, i64* %pc
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store i64 %t64, i64* %qc
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ret void
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}
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