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8975f60913
A spilled load of an immediate can use MVHI/MVGHI instead. A compare of a spilled register against an immediate can use CHSI/CGHSI. A logical compare can use CLFHSI/CLGHSI. Review: Ulrich Weigand Differential Revision: https://reviews.llvm.org/D76055
56 lines
1.9 KiB
LLVM
56 lines
1.9 KiB
LLVM
; RUN: llc < %s -mtriple=s390x-linux-gnu -O3 -mcpu=z10 | FileCheck %s
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; RUN: llc < %s -mtriple=s390x-linux-gnu -O3 -mcpu=z14 | FileCheck %s
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;
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; Test folding of spilled immediate loads and compares.
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define i32 @fun0(i32 *%src, i32 %arg) nounwind {
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; CHECK-LABEL: fun0:
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; CHECK: mvhi 164(%r15), 0 # 4-byte Folded Spill
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; CHECK: mvc 164(4,%r15), 0(%r2) # 4-byte Folded Spill
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; CHECK-LABEL: .LBB0_2:
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; CHECK: chsi 164(%r15), 2 # 4-byte Folded Reload
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entry:
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%cmp = icmp eq i32 %arg, 0
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br i1 %cmp, label %cond, label %exit
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cond:
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%val0 = load i32, i32 *%src
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call void asm sideeffect "", "~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"() nounwind
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br label %exit
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exit:
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%tmp0 = phi i32 [0, %entry], [%val0, %cond]
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call void asm sideeffect "", "~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"() nounwind
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%cmp0 = icmp ne i32 %tmp0, 2
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%zxt0 = zext i1 %cmp0 to i32
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%and0 = and i32 %arg, %zxt0
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ret i32 %and0
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}
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define i64 @fun1(i64 *%src, i64 %arg) nounwind {
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; CHECK-LABEL: fun1:
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; CHECK: mvghi 168(%r15), 0 # 8-byte Folded Spill
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; CHECK: mvc 168(8,%r15), 0(%r2) # 8-byte Folded Spill
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; CHECK-LABEL: .LBB1_2:
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; CHECK: cghsi 168(%r15), 2 # 8-byte Folded Reload
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entry:
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%cmp = icmp eq i64 %arg, 0
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br i1 %cmp, label %cond, label %exit
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cond:
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%val0 = load i64, i64 *%src
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call void asm sideeffect "", "~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"() nounwind
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br label %exit
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exit:
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%tmp0 = phi i64 [0, %entry], [%val0, %cond]
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call void asm sideeffect "", "~{r0},~{r1},~{r2},~{r3},~{r4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"() nounwind
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%cmp0 = icmp ne i64 %tmp0, 2
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%zxt0 = zext i1 %cmp0 to i64
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%and0 = and i64 %arg, %zxt0
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ret i64 %and0
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}
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