derek.holloway
7502bf64a4
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51 lines
1.2 KiB
LLVM
51 lines
1.2 KiB
LLVM
; RUN: llc -mtriple=hexagon -hexagon-initial-cfg-cleanup=0 -O2 < %s \
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; RUN: | FileCheck %s
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; Test coverage for HexagonCFGOptimizer: exercise the J2_jumptnewpt/J2_jumpfnewpt
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; branch inversion path. The CFG optimizer should invert a conditional branch
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; to eliminate an unconditional jump block.
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; CHECK-LABEL: test_cfgopt_newpt:
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; CHECK: if ({{!?}}p0
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define i32 @test_cfgopt_newpt(i32 %a, i32 %b, i32 %c) #0 {
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entry:
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%cmp = icmp sgt i32 %a, %b
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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%add = add nsw i32 %a, %c
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br label %return
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if.else:
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%sub = sub nsw i32 %b, %c
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%mul = mul nsw i32 %sub, 3
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br label %return
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return:
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%retval = phi i32 [ %add, %if.then ], [ %mul, %if.else ]
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ret i32 %retval
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}
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; Exercise the case2 path of CFG optimizer where JumpAroundTarget has a single
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; predecessor and a single successor with an unconditional jump.
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; CHECK-LABEL: test_cfgopt_case2:
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; CHECK: if ({{!?}}p0
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define i32 @test_cfgopt_case2(i32 %a, i32 %b, ptr %p) #0 {
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entry:
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%cmp = icmp eq i32 %a, 0
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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store i32 %b, ptr %p, align 4
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br label %merge
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if.else:
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%add = add i32 %a, %b
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store i32 %add, ptr %p, align 4
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br label %merge
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merge:
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%val = load i32, ptr %p, align 4
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ret i32 %val
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}
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