forked from OSchip/llvm-project
323 lines
11 KiB
LLVM
323 lines
11 KiB
LLVM
; Test loop tuning.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 \
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; RUN: | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-Z13
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; Test that strength reduction is applied to addresses with a scale factor,
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; but that indexed addressing can still be used.
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define void @f1(i32 *%dest, i32 %a) {
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; CHECK-LABEL: f1:
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; CHECK-NOT: sllg
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; CHECK: st %r3, 400({{%r[1-5],%r[1-5]}})
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; CHECK: br %r14
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entry:
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br label %loop
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loop:
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%index = phi i64 [ 0, %entry ], [ %next, %loop ]
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%ptr = getelementptr i32, i32 *%dest, i64 %index
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store i32 %a, i32 *%ptr
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%next = add i64 %index, 1
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%cmp = icmp ne i64 %next, 100
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br i1 %cmp, label %loop, label %exit
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exit:
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ret void
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}
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; Test a loop that should be converted into dbr form and then use BRCT.
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define void @f2(i32 *%src, i32 *%dest) {
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; CHECK-LABEL: f2:
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; CHECK: lhi [[REG:%r[0-5]]], 100
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; CHECK: [[LABEL:\.[^:]*]]:{{.*}} %loop
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; CHECK: brct [[REG]], [[LABEL]]
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; CHECK: br %r14
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entry:
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br label %loop
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loop:
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%count = phi i32 [ 0, %entry ], [ %next, %loop.next ]
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%next = add i32 %count, 1
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%val = load volatile i32 , i32 *%src
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%cmp = icmp eq i32 %val, 0
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br i1 %cmp, label %loop.next, label %loop.store
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loop.store:
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%add = add i32 %val, 1
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store volatile i32 %add, i32 *%dest
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br label %loop.next
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loop.next:
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%cont = icmp ne i32 %next, 100
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br i1 %cont, label %loop, label %exit
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exit:
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ret void
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}
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; Like f2, but for BRCTG.
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define void @f3(i64 *%src, i64 *%dest) {
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; CHECK-LABEL: f3:
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; CHECK: lghi [[REG:%r[0-5]]], 100
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; CHECK: [[LABEL:\.[^:]*]]:{{.*}} %loop
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; CHECK: brctg [[REG]], [[LABEL]]
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; CHECK: br %r14
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entry:
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br label %loop
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loop:
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%count = phi i64 [ 0, %entry ], [ %next, %loop.next ]
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%next = add i64 %count, 1
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%val = load volatile i64 , i64 *%src
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%cmp = icmp eq i64 %val, 0
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br i1 %cmp, label %loop.next, label %loop.store
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loop.store:
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%add = add i64 %val, 1
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store volatile i64 %add, i64 *%dest
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br label %loop.next
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loop.next:
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%cont = icmp ne i64 %next, 100
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br i1 %cont, label %loop, label %exit
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exit:
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ret void
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}
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; Test a loop with a 64-bit decremented counter in which the 32-bit
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; low part of the counter is used after the decrement. This is an example
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; of a subregister use being the only thing that blocks a conversion to BRCTG.
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define void @f4(i32 *%src, i32 *%dest, i64 *%dest2, i64 %count) {
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; CHECK-LABEL: f4:
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; CHECK: aghi [[REG:%r[0-5]]], -1
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; CHECK: lr [[REG2:%r[0-5]]], [[REG]]
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; CHECK: stg [[REG2]],
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; CHECK: jne {{\..*}}
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; CHECK: br %r14
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entry:
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br label %loop
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loop:
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%left = phi i64 [ %count, %entry ], [ %next, %loop.next ]
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store volatile i64 %left, i64 *%dest2
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%val = load volatile i32 , i32 *%src
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%cmp = icmp eq i32 %val, 0
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br i1 %cmp, label %loop.next, label %loop.store
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loop.store:
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%add = add i32 %val, 1
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store volatile i32 %add, i32 *%dest
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br label %loop.next
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loop.next:
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%next = add i64 %left, -1
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%ext = zext i32 %val to i64
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%shl = shl i64 %ext, 32
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%and = and i64 %next, 4294967295
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%or = or i64 %shl, %and
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store volatile i64 %or, i64 *%dest2
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%cont = icmp ne i64 %next, 0
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br i1 %cont, label %loop, label %exit
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exit:
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ret void
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}
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; Test that negative offsets are avoided for loads of floating point.
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%s.float = type { float, float, float }
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define void @f5(%s.float* nocapture %a,
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%s.float* nocapture readonly %b,
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i32 zeroext %S) {
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; CHECK-Z13-LABEL: f5:
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; CHECK-Z13-NOT: -{{[0-9]+}}(%r
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entry:
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%cmp9 = icmp eq i32 %S, 0
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br i1 %cmp9, label %for.cond.cleanup, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.cond.cleanup.loopexit: ; preds = %for.body
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br label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
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ret void
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ]
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%a1 = getelementptr inbounds %s.float, %s.float* %b, i64 %indvars.iv, i32 0
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%tmp = load float, float* %a1, align 4
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%b4 = getelementptr inbounds %s.float, %s.float* %b, i64 %indvars.iv, i32 1
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%tmp1 = load float, float* %b4, align 4
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%add = fadd float %tmp, %tmp1
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%c = getelementptr inbounds %s.float, %s.float* %b, i64 %indvars.iv, i32 2
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%tmp2 = load float, float* %c, align 4
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%add7 = fadd float %add, %tmp2
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%a10 = getelementptr inbounds %s.float, %s.float* %a, i64 %indvars.iv, i32 0
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store float %add7, float* %a10, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %S
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br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
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}
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; Test that negative offsets are avoided for loads of double.
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%s.double = type { double, double, double }
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define void @f6(%s.double* nocapture %a,
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%s.double* nocapture readonly %b,
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i32 zeroext %S) {
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; CHECK-Z13-LABEL: f6:
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; CHECK-Z13-NOT: -{{[0-9]+}}(%r
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entry:
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%cmp9 = icmp eq i32 %S, 0
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br i1 %cmp9, label %for.cond.cleanup, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.cond.cleanup.loopexit: ; preds = %for.body
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br label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
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ret void
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ]
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%a1 = getelementptr inbounds %s.double, %s.double* %b, i64 %indvars.iv, i32 0
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%tmp = load double, double* %a1, align 4
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%b4 = getelementptr inbounds %s.double, %s.double* %b, i64 %indvars.iv, i32 1
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%tmp1 = load double, double* %b4, align 4
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%add = fadd double %tmp, %tmp1
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%c = getelementptr inbounds %s.double, %s.double* %b, i64 %indvars.iv, i32 2
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%tmp2 = load double, double* %c, align 4
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%add7 = fadd double %add, %tmp2
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%a10 = getelementptr inbounds %s.double, %s.double* %a, i64 %indvars.iv, i32 0
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store double %add7, double* %a10, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %S
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br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
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}
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; Test that negative offsets are avoided for memory accesses of vector type.
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%s.vec = type { <4 x i32>, <4 x i32>, <4 x i32> }
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define void @f7(%s.vec* nocapture %a,
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%s.vec* nocapture readonly %b,
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i32 zeroext %S) {
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; CHECK-Z13-LABEL: f7:
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; CHECK-Z13-NOT: -{{[0-9]+}}(%r
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entry:
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%cmp9 = icmp eq i32 %S, 0
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br i1 %cmp9, label %for.cond.cleanup, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.cond.cleanup.loopexit: ; preds = %for.body
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br label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
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ret void
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %for.body.preheader ]
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%a1 = getelementptr inbounds %s.vec, %s.vec* %b, i64 %indvars.iv, i32 0
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%tmp = load <4 x i32>, <4 x i32>* %a1, align 4
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%b4 = getelementptr inbounds %s.vec, %s.vec* %b, i64 %indvars.iv, i32 1
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%tmp1 = load <4 x i32>, <4 x i32>* %b4, align 4
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%add = add <4 x i32> %tmp1, %tmp
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%c = getelementptr inbounds %s.vec, %s.vec* %b, i64 %indvars.iv, i32 2
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%tmp2 = load <4 x i32>, <4 x i32>* %c, align 4
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%add7 = add <4 x i32> %add, %tmp2
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%a10 = getelementptr inbounds %s.vec, %s.vec* %a, i64 %indvars.iv, i32 0
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store <4 x i32> %add7, <4 x i32>* %a10, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %S
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br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
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}
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; Test that a memcpy loop does not get a lot of lays before each mvc (D12 and no index-reg).
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%0 = type { %1, %2* }
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%1 = type { %2*, %2* }
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%2 = type <{ %3, i32, [4 x i8] }>
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%3 = type { i16*, i16*, i16* }
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i1) #0
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define void @f8() {
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; CHECK-Z13-LABEL: f8:
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; CHECK-Z13: mvc
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; CHECK-Z13-NEXT: mvc
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; CHECK-Z13-NEXT: mvc
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; CHECK-Z13-NEXT: mvc
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bb:
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%tmp = load %0*, %0** undef, align 8
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br i1 undef, label %bb2, label %bb1
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bb1: ; preds = %bb
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br label %bb2
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bb2: ; preds = %bb1, %bb
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%tmp3 = phi %0* [ %tmp, %bb ], [ undef, %bb1 ]
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%tmp4 = phi %0* [ undef, %bb ], [ undef, %bb1 ]
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br label %bb5
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bb5: ; preds = %bb5, %bb2
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%tmp6 = phi %0* [ %tmp21, %bb5 ], [ %tmp3, %bb2 ]
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%tmp7 = phi %0* [ %tmp20, %bb5 ], [ %tmp4, %bb2 ]
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%tmp8 = getelementptr inbounds %0, %0* %tmp7, i64 -1
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%tmp9 = getelementptr inbounds %0, %0* %tmp6, i64 -1
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%tmp10 = bitcast %0* %tmp9 to i8*
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%tmp11 = bitcast %0* %tmp8 to i8*
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %tmp10, i8* align 8 %tmp11, i64 24, i1 false)
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%tmp12 = getelementptr inbounds %0, %0* %tmp7, i64 -2
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%tmp13 = getelementptr inbounds %0, %0* %tmp6, i64 -2
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%tmp14 = bitcast %0* %tmp13 to i8*
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%tmp15 = bitcast %0* %tmp12 to i8*
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %tmp14, i8* align 8 %tmp15, i64 24, i1 false)
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%tmp16 = getelementptr inbounds %0, %0* %tmp7, i64 -3
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%tmp17 = getelementptr inbounds %0, %0* %tmp6, i64 -3
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%tmp18 = bitcast %0* %tmp17 to i8*
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%tmp19 = bitcast %0* %tmp16 to i8*
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %tmp18, i8* align 8 %tmp19, i64 24, i1 false)
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%tmp20 = getelementptr inbounds %0, %0* %tmp7, i64 -4
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%tmp21 = getelementptr inbounds %0, %0* %tmp6, i64 -4
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%tmp22 = bitcast %0* %tmp21 to i8*
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%tmp23 = bitcast %0* %tmp20 to i8*
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tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %tmp22, i8* align 8 %tmp23, i64 24, i1 false)
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br label %bb5
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}
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; Test that a chsi does not need an aghik inside the loop (no index reg)
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define void @f9() {
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; CHECK-Z13-LABEL: f9:
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; CHECK-Z13: # =>This Inner Loop Header: Depth=1
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; CHECK-Z13-NOT: aghik
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; CHECK-Z13: chsi
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entry:
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br label %for.body.i63
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for.body.i63: ; preds = %for.inc.i, %entry
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%indvars.iv155.i = phi i64 [ 0, %entry ], [ %indvars.iv.next156.i.3, %for.inc.i ]
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%arrayidx.i62 = getelementptr inbounds i32, i32* undef, i64 %indvars.iv155.i
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%tmp = load i32, i32* %arrayidx.i62, align 4
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%cmp9.i = icmp eq i32 %tmp, 0
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br i1 %cmp9.i, label %for.inc.i, label %if.then10.i
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if.then10.i: ; preds = %for.body.i63
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unreachable
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for.inc.i: ; preds = %for.body.i63
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%indvars.iv.next156.i = or i64 %indvars.iv155.i, 1
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%arrayidx.i62.1 = getelementptr inbounds i32, i32* undef, i64 %indvars.iv.next156.i
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%tmp1 = load i32, i32* %arrayidx.i62.1, align 4
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%indvars.iv.next156.i.3 = add nsw i64 %indvars.iv155.i, 4
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br label %for.body.i63
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}
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