derek.holloway
7502bf64a4
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102 lines
3.4 KiB
LLVM
102 lines
3.4 KiB
LLVM
; RUN: llc -mtriple=thumbv7 -mcpu=cortex-m0 < %s -disable-lsr | FileCheck %s
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; FIXME: LSR mangles the last two testcases pretty badly. When this is fixed, remove
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; the -disable-lsr above.
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; CHECK-LABEL: @f
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; CHECK: ldm {{r[0-9]}}!, {r{{[0-9]}}}
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define i32 @f(ptr readonly %a, ptr readnone %b) {
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%1 = icmp eq ptr %a, %b
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br i1 %1, label %._crit_edge, label %.lr.ph
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.lr.ph: ; preds = %.lr.ph, %0
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%i.02 = phi i32 [ %3, %.lr.ph ], [ 0, %0 ]
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%.01 = phi ptr [ %4, %.lr.ph ], [ %a, %0 ]
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%2 = load i32, ptr %.01, align 4
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%3 = add nsw i32 %2, %i.02
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%4 = getelementptr inbounds i32, ptr %.01, i32 1
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%5 = icmp eq ptr %4, %b
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br i1 %5, label %._crit_edge, label %.lr.ph
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._crit_edge: ; preds = %.lr.ph, %0
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%i.0.lcssa = phi i32 [ 0, %0 ], [ %3, %.lr.ph ]
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ret i32 %i.0.lcssa
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}
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; CHECK-LABEL: @g
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; CHECK-NOT: ldm
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define i32 @g(ptr readonly %a, ptr readnone %b) {
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%1 = icmp eq ptr %a, %b
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br i1 %1, label %._crit_edge, label %.lr.ph
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.lr.ph: ; preds = %.lr.ph, %0
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%i.02 = phi i32 [ %3, %.lr.ph ], [ 0, %0 ]
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%.01 = phi ptr [ %4, %.lr.ph ], [ %a, %0 ]
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%2 = load i32, ptr %.01, align 4
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%3 = add nsw i32 %2, %i.02
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%4 = getelementptr inbounds i32, ptr %.01, i32 2
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%5 = icmp eq ptr %4, %b
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br i1 %5, label %._crit_edge, label %.lr.ph
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._crit_edge: ; preds = %.lr.ph, %0
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%i.0.lcssa = phi i32 [ 0, %0 ], [ %3, %.lr.ph ]
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ret i32 %i.0.lcssa
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}
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; CHECK-LABEL: @h
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; CHECK: stm {{r[0-9]}}!, {r{{[0-9]}}}
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define void @h(ptr %a, ptr readnone %b) {
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%1 = icmp eq ptr %a, %b
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br i1 %1, label %._crit_edge, label %.lr.ph
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.lr.ph: ; preds = %.lr.ph, %0
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%i.02 = phi i32 [ %2, %.lr.ph ], [ 0, %0 ]
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%.01 = phi ptr [ %3, %.lr.ph ], [ %a, %0 ]
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%2 = add nsw i32 %i.02, 1
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store i32 %i.02, ptr %.01, align 4
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%3 = getelementptr inbounds i32, ptr %.01, i32 1
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%4 = icmp eq ptr %3, %b
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br i1 %4, label %._crit_edge, label %.lr.ph
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._crit_edge: ; preds = %.lr.ph, %0
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ret void
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}
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; CHECK-LABEL: @j
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; CHECK-NOT: stm
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define void @j(ptr %a, ptr readnone %b) {
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%1 = icmp eq ptr %a, %b
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br i1 %1, label %._crit_edge, label %.lr.ph
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.lr.ph: ; preds = %.lr.ph, %0
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%i.02 = phi i32 [ %2, %.lr.ph ], [ 0, %0 ]
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%.01 = phi ptr [ %3, %.lr.ph ], [ %a, %0 ]
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%2 = add nsw i32 %i.02, 1
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store i32 %i.02, ptr %.01, align 4
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%3 = getelementptr inbounds i32, ptr %.01, i32 2
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%4 = icmp eq ptr %3, %b
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br i1 %4, label %._crit_edge, label %.lr.ph
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._crit_edge: ; preds = %.lr.ph, %0
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ret void
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}
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; Make sure we don't transform str->stm when unaligned loads are allowed.
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; CHECK-LABEL: @nostrictalign
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; CHECK: str r2, [r0]
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define void @nostrictalign(ptr %a, ptr readnone %b) "target-features"="-strict-align" {
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%1 = icmp eq ptr %a, %b
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br i1 %1, label %._crit_edge, label %.lr.ph
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.lr.ph: ; preds = %.lr.ph, %0
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%i.02 = phi i32 [ %2, %.lr.ph ], [ 0, %0 ]
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%.01 = phi ptr [ %3, %.lr.ph ], [ %a, %0 ]
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%2 = add nsw i32 %i.02, 1
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store i32 %i.02, ptr %.01, align 1
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%3 = getelementptr inbounds i32, ptr %.01, i32 1
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%4 = icmp eq ptr %3, %b
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br i1 %4, label %._crit_edge, label %.lr.ph
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._crit_edge: ; preds = %.lr.ph, %0
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ret void
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}
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