49 lines
1.8 KiB
LLVM
49 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s
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; LSR's OptimizeMax function shouldn't try to eliminate this max, because
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; it has three operands.
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
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define void @foo(double* nocapture %p, i64 %x, i64 %y) nounwind {
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; CHECK-LABEL: foo:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: testq %rdx, %rdx
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; CHECK-NEXT: movl $1, %eax
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; CHECK-NEXT: cmovneq %rdx, %rax
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; CHECK-NEXT: cmpq %rsi, %rax
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; CHECK-NEXT: cmovbeq %rsi, %rax
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; CHECK-NEXT: .p2align 4, 0x90
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; CHECK-NEXT: .LBB0_1: # %bb4
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; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero
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; CHECK-NEXT: addsd %xmm0, %xmm0
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; CHECK-NEXT: movsd %xmm0, (%rdi)
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; CHECK-NEXT: addq $8, %rdi
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; CHECK-NEXT: decq %rax
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; CHECK-NEXT: jne .LBB0_1
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; CHECK-NEXT: # %bb.2: # %return
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; CHECK-NEXT: retq
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entry:
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%tmp = icmp eq i64 %y, 0 ; <i1> [#uses=1]
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%umax = select i1 %tmp, i64 1, i64 %y ; <i64> [#uses=2]
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%tmp8 = icmp ugt i64 %umax, %x ; <i1> [#uses=1]
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%umax9 = select i1 %tmp8, i64 %umax, i64 %x ; <i64> [#uses=1]
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br label %bb4
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bb4: ; preds = %bb4, %entry
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%i.07 = phi i64 [ 0, %entry ], [ %2, %bb4 ] ; <i64> [#uses=2]
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%scevgep = getelementptr double, double* %p, i64 %i.07 ; <double*> [#uses=2]
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%0 = load double, double* %scevgep, align 8 ; <double> [#uses=1]
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%1 = fmul double %0, 2.000000e+00 ; <double> [#uses=1]
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store double %1, double* %scevgep, align 8
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%2 = add i64 %i.07, 1 ; <i64> [#uses=2]
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%exitcond = icmp eq i64 %2, %umax9 ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %bb4
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return: ; preds = %bb4
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ret void
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}
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