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2781f30eac
hand-crafted testcase which demonstrates the bug that was exposed in 254.gap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73793 91177308-0d34-0410-b5e6-96231b3b80d8
79 lines
2.5 KiB
LLVM
79 lines
2.5 KiB
LLVM
; RUN: llvm-as < %s | llc -march=x86-64 | not grep cmov
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; LSR should be able to eliminate both smax and umax expressions
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; in loop trip counts.
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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 @fs(double* nocapture %p, i64 %n) nounwind {
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entry:
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%tmp = icmp slt i64 %n, 1 ; <i1> [#uses=1]
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%smax = select i1 %tmp, i64 1, i64 %n ; <i64> [#uses=1]
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br label %bb
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bb: ; preds = %bb, %entry
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%i.0 = phi i64 [ 0, %entry ], [ %0, %bb ] ; <i64> [#uses=2]
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%scevgep = getelementptr double* %p, i64 %i.0 ; <double*> [#uses=1]
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store double 0.000000e+00, double* %scevgep, align 8
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%0 = add i64 %i.0, 1 ; <i64> [#uses=2]
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%exitcond = icmp eq i64 %0, %smax ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %bb
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return: ; preds = %bb
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ret void
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}
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define void @bs(double* nocapture %p, i64 %n) nounwind {
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entry:
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%tmp = icmp sge i64 %n, 1 ; <i1> [#uses=1]
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%smax = select i1 %tmp, i64 %n, i64 1 ; <i64> [#uses=1]
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br label %bb
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bb: ; preds = %bb, %entry
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%i.0 = phi i64 [ 0, %entry ], [ %0, %bb ] ; <i64> [#uses=2]
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%scevgep = getelementptr double* %p, i64 %i.0 ; <double*> [#uses=1]
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store double 0.000000e+00, double* %scevgep, align 8
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%0 = add i64 %i.0, 1 ; <i64> [#uses=2]
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%exitcond = icmp eq i64 %0, %smax ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %bb
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return: ; preds = %bb
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ret void
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}
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define void @fu(double* nocapture %p, i64 %n) nounwind {
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entry:
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%tmp = icmp eq i64 %n, 0 ; <i1> [#uses=1]
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%umax = select i1 %tmp, i64 1, i64 %n ; <i64> [#uses=1]
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br label %bb
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bb: ; preds = %bb, %entry
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%i.0 = phi i64 [ 0, %entry ], [ %0, %bb ] ; <i64> [#uses=2]
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%scevgep = getelementptr double* %p, i64 %i.0 ; <double*> [#uses=1]
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store double 0.000000e+00, double* %scevgep, align 8
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%0 = add i64 %i.0, 1 ; <i64> [#uses=2]
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%exitcond = icmp eq i64 %0, %umax ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %bb
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return: ; preds = %bb
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ret void
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}
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define void @bu(double* nocapture %p, i64 %n) nounwind {
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entry:
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%tmp = icmp ne i64 %n, 0 ; <i1> [#uses=1]
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%umax = select i1 %tmp, i64 %n, i64 1 ; <i64> [#uses=1]
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br label %bb
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bb: ; preds = %bb, %entry
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%i.0 = phi i64 [ 0, %entry ], [ %0, %bb ] ; <i64> [#uses=2]
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%scevgep = getelementptr double* %p, i64 %i.0 ; <double*> [#uses=1]
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store double 0.000000e+00, double* %scevgep, align 8
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%0 = add i64 %i.0, 1 ; <i64> [#uses=2]
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%exitcond = icmp eq i64 %0, %umax ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %bb
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return: ; preds = %bb
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ret void
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}
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