derek.holloway
7502bf64a4
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64 lines
1.7 KiB
LLVM
64 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -verify-machineinstrs -mtriple=powerpc -mcpu=pwr7 < %s | FileCheck %s
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; This piece of IR is expanded from memcmp.
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define i1 @cmp(ptr %a, ptr %b) {
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; CHECK-LABEL: cmp:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: lwz 5, 4(3)
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; CHECK-NEXT: lwz 7, 0(3)
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; CHECK-NEXT: lwz 6, 4(4)
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; CHECK-NEXT: lwz 8, 0(4)
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; CHECK-NEXT: xor 9, 7, 8
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; CHECK-NEXT: xor 10, 5, 6
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; CHECK-NEXT: or. 9, 10, 9
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; CHECK-NEXT: bne 0, .LBB0_2
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; CHECK-NEXT: # %bb.1: # %loadbb1
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; CHECK-NEXT: lbz 3, 8(3)
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; CHECK-NEXT: lbz 4, 8(4)
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; CHECK-NEXT: sub 3, 3, 4
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; CHECK-NEXT: srwi 3, 3, 31
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; CHECK-NEXT: blr
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; CHECK-NEXT: .LBB0_2: # %res_block
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; CHECK-NEXT: cmplw 7, 8
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; CHECK-NEXT: cmplw 1, 5, 6
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; CHECK-NEXT: li 3, 1
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; CHECK-NEXT: li 4, -1
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; CHECK-NEXT: crandc 20, 0, 2
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; CHECK-NEXT: crand 21, 2, 4
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; CHECK-NEXT: cror 20, 21, 20
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; CHECK-NEXT: isel 3, 4, 3, 20
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; CHECK-NEXT: srwi 3, 3, 31
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; CHECK-NEXT: blr
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entry:
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br label %loadbb
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res_block:
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%0 = icmp ult i64 %4, %5
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%1 = select i1 %0, i32 -1, i32 1
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br label %endblock
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loadbb:
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%2 = bitcast ptr %a to ptr
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%3 = bitcast ptr %b to ptr
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%4 = load i64, ptr %2, align 1
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%5 = load i64, ptr %3, align 1
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%6 = icmp eq i64 %4, %5
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br i1 %6, label %loadbb1, label %res_block
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loadbb1:
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%7 = getelementptr i8, ptr %a, i64 8
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%8 = getelementptr i8, ptr %b, i64 8
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%9 = load i8, ptr %7, align 1
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%10 = load i8, ptr %8, align 1
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%11 = zext i8 %9 to i32
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%12 = zext i8 %10 to i32
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%13 = sub i32 %11, %12
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br label %endblock
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endblock:
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%phi.res = phi i32 [ %13, %loadbb1 ], [ %1, %res_block ]
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%icmp = icmp slt i32 %phi.res, 0
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ret i1 %icmp
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}
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