f541a5048a
By reordering the objects on the stack frame after looking at the users, a better utilization of displacement operands will result. This means less needed Load Address instructions for the accessing of these objects. This is important for very large functions where otherwise small changes could cause a lot more/less accesses go out of range. Note: this is not yet enabled for SystemZXPLINKFrameLowering, but should be. Review: Ulrich Weigand Differential Revision: https://reviews.llvm.org/D115690
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 160(%r15), 0 # 4-byte Folded Spill
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; CHECK: mvc 160(4,%r15), 0(%r2) # 4-byte Folded Spill
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; CHECK-LABEL: .LBB0_2:
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; CHECK: chsi 160(%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 160(%r15), 0 # 8-byte Folded Spill
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; CHECK: mvc 160(8,%r15), 0(%r2) # 8-byte Folded Spill
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; CHECK-LABEL: .LBB1_2:
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; CHECK: cghsi 160(%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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